JEE Main Chemistry question

o-Hydroxybenzaldehyde, although it contains an enolic (phenolic) group, does not give the test for that group with because

(A)It is steam volatile
(B)Of intermolecular H-bonding
(C)Of intramolecular H-bondingCorrect
(D)All of the above

Answer: (C)

Solution

In o-hydroxybenzaldehyde (salicylaldehyde), the phenolic –OH group is positioned close enough to the adjacent aldehyde (–CHO) group to form a strong intramolecular hydrogen bond (a six-membered chelate ring). This internal hydrogen bonding "locks up" the –OH group, making it unavailable to react with

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Question ID VK-133405